CN113759253A - Hydrogen fuel cell voltage inspection control method, system and computer readable storage medium - Google Patents
Hydrogen fuel cell voltage inspection control method, system and computer readable storage medium Download PDFInfo
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- 238000007689 inspection Methods 0.000 title claims abstract description 37
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- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/378—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] specially adapted for the type of battery or accumulator
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
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Abstract
The application relates to a voltage inspection control method, a voltage inspection control system and a computer-readable storage medium for a hydrogen fuel cell, which belong to the technical field of communication, and the method comprises the following steps: a voltage signal acquisition step, which is to acquire voltage signals of each single battery in the battery pack; a voltage value obtaining step, namely obtaining the voltage value of each single battery according to the voltage signal of each single battery; a voltage state judgment step, namely judging whether the voltage difference value between the voltage value of each single battery and the preset voltage value exceeds a preset error range, and if the voltage difference value exceeds the preset error range, obtaining that the voltage state of each single battery is a fault state; if the voltage state of the single battery is not beyond the preset error range, the voltage state of the single battery is a normal state; and a charging and discharging management step, namely performing corresponding charging and discharging management on the single battery with the voltage state being a fault state based on the voltage information of each single battery and a preset voltage value. This application has the effect of each battery cell's voltage status in the group battery of being convenient for know.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a method and a system for controlling voltage polling of a hydrogen fuel cell, and a computer-readable storage medium.
Background
At present, due to the characteristics of convenience, rapidness, greenness, recyclability and the like, batteries become the first choice of more and more energy storage devices and are widely applied to high-power energy storage systems. The hydrogen fuel cell is used as one of the automobile power supply modes, and the performance of the cell directly influences the endurance mileage of the automobile.
In practical applications, since the voltage and the capacity of each single battery cell are low, hundreds of battery cells are required to be connected in series to form a battery pack and are packaged in a housing for power supply.
For the above related technologies, the inventor thinks that when the battery pack is used for supplying power, the voltage of some single batteries is often too high or too low, and due to the fact that the voltage state of each single battery in the battery pack is not convenient to know, and then corresponding measures cannot be made in time, the situation that the power supply performance of the battery pack is affected due to the inconsistent voltage of the batteries may occur.
Disclosure of Invention
In order to facilitate understanding of the voltage state of each single battery in the battery pack, the application provides a hydrogen fuel battery voltage inspection control method, a hydrogen fuel battery voltage inspection control system and a computer readable storage medium.
In a first aspect, the application provides a voltage inspection control method for a hydrogen fuel cell, which adopts the following technical scheme:
a voltage inspection control method for a hydrogen fuel cell comprises the following steps,
a voltage signal acquisition step, which is to acquire voltage signals of each single battery in the battery pack;
a voltage value obtaining step, namely obtaining the voltage value of each single battery according to the voltage signal of each single battery;
a voltage state judgment step, namely judging whether the voltage difference value between the voltage value of each single battery and a preset voltage value exceeds a preset error range, and if the voltage difference value exceeds the preset error range, obtaining that the voltage state of each single battery is a fault state; if the voltage state of the single battery is not beyond the preset error range, the voltage state of the single battery is obtained to be a normal state; and the number of the first and second groups,
the method comprises the following steps of charging and discharging management, wherein the charging and discharging management step is used for acquiring voltage information of each single battery and carrying out corresponding charging and discharging management on the single battery with the voltage state being a fault state on the basis of the voltage information of each single battery and a preset voltage value; wherein the voltage information includes a voltage state and a voltage value.
Through adopting above-mentioned technical scheme, in carrying out the battery voltage and patrolling and examining the in-process, gather each battery cell's voltage signal in the group battery, voltage signal according to each battery cell handles the calculation, obtain each battery cell's voltage value, then judge each battery cell's voltage state according to the voltage value, can obtain each battery cell's voltage information, and carry out corresponding charge-discharge management to the battery cell that voltage state is fault status, thereby be convenient for know each battery cell's voltage state in the group battery, and in time make counter-measure to the battery cell of not normally working, the condition emergence that partial battery cell voltage nonconformity influences group battery power supply performance has been avoided to a certain extent, security and stability when having guaranteed the group battery power supply.
Optionally, the step of obtaining the preset voltage value includes,
and calculating to obtain the average voltage value of each single battery according to the voltage value of each single battery, and taking the average voltage value as a preset voltage value.
By adopting the technical scheme, the average voltage value of each single battery is taken as the preset voltage value, so that the consistency of the voltage values of each single battery in the battery pack is kept.
Optionally, the step of determining the voltage state further includes,
acquiring a voltage value of a single battery with a voltage state being a fault state, judging whether the voltage value of the single battery with the voltage state being the fault state is larger than a preset voltage value, and if so, sending a single battery over-voltage reminding signal; if not, sending a single battery low voltage reminding signal.
By adopting the technical scheme, if a certain single battery in the battery pack is detected to be in a fault state and the voltage value is greater than the preset voltage value, a single battery over-voltage reminding signal is sent; if a certain single battery in the battery pack is in a fault state and the voltage value is smaller than the preset voltage value, a single battery over-low voltage reminding signal is sent, so that managers can be reminded in time, and the safety of the battery pack during power supply is improved.
Optionally, the step of performing corresponding charge and discharge management on the single battery with the voltage state being the fault state includes,
acquiring a voltage value of a single battery with a voltage state being a fault state, judging whether the voltage value of the single battery with the voltage state being the fault state is larger than a preset voltage value or not, and if so, performing discharge management on the single battery according to the preset voltage value; and if not, performing charging management on the single battery according to a preset voltage value.
By adopting the technical scheme, different charging and discharging management operations are carried out on the single batteries in the fault state according to different voltage values, so that the voltage values of the single batteries tend to be balanced, the consistency of the battery voltage is improved, and the power supply performance of the battery pack is ensured.
Optionally, the charging and discharging management step further comprises,
acquiring the number of single batteries in a fault state in the battery pack according to the voltage information of each single battery, determining a corresponding preset sampling frequency according to the number based on a sampling mapping table, and re-acquiring voltage signals of each single battery in the battery pack according to the preset sampling frequency; the sampling mapping table comprises a corresponding relation between a plurality of groups of quantity intervals and a preset sampling frequency.
By adopting the technical scheme, the preset sampling frequency is determined according to the number of the single batteries in the battery pack in the fault state, the dynamic adjustment of the sampling frequency is realized, the condition that the system resource is wasted due to higher sampling frequency or the voltage information is not obtained timely due to lower sampling frequency is reduced, and the adaptability is improved.
In a second aspect, the present application provides a hydrogen fuel cell voltage inspection control system, which adopts the following technical scheme:
a voltage inspection control system for a hydrogen fuel cell comprises a voltage acquisition module, a micro-processing module and a management terminal;
the voltage signal input end of the voltage acquisition module is used for being connected with the voltage signal output end of each single battery in the battery pack; the voltage acquisition module is used for acquiring voltage signals of the single batteries and converting the voltage signals into digital signals;
the digital signal input end of the micro-processing module is connected with the digital signal output end of the voltage acquisition module; the micro-processing module is used for acquiring the digital signals and processing and calculating the digital signals to obtain voltage information of each single battery; wherein the voltage information comprises a voltage value and a voltage state;
and the management terminal is in communication connection with the micro-processing module and is used for receiving the voltage information of each single battery and performing corresponding charging and discharging management.
Through adopting above-mentioned technical scheme, in the battery voltage process of patrolling and examining, utilize the voltage acquisition module to gather each battery cell's voltage signal in the group battery, and convert voltage signal into digital signal, carry out processing calculation to digital signal through the microprocessing module, obtain each battery cell's voltage information and feed back to management terminal, management terminal carries out corresponding charge-discharge management according to each battery cell's voltage information again, thereby be convenient for know each battery cell's voltage status in the group battery, and in time make counter-measure to the battery cell of not normally working, the condition emergence of partial battery cell voltage nonconformity influence group battery power supply performance has been avoided to a certain extent, security and stability when having guaranteed the group battery power supply.
Optionally, the voltage acquisition module includes a voltage acquisition chip U1, an analog signal input terminal of the voltage acquisition chip U1 is connected to a voltage signal input terminal of the voltage acquisition module, and a digital signal output terminal of the voltage acquisition chip U1 is connected to a digital signal output terminal of the voltage acquisition module.
Optionally, the hydrogen fuel cell voltage inspection control system further includes a filter circuit, and the filter circuit is configured to filter a noise signal generated when the voltage signal is collected by the voltage collection module.
By adopting the technical scheme, the noise signal generated when the voltage signal is acquired by the voltage acquisition module is filtered by the filter circuit, so that the effect of smoothing the voltage signal is achieved, and the stability of the voltage acquisition is improved.
Optionally, the filter circuit includes a first resistor R1 and a first non-polar capacitor C1, where one end of the first resistor R1 is used for connecting with a cell of the battery pack, and the other end of the first resistor R1 is connected to a voltage signal input end of the voltage acquisition module; the first non-polar capacitor C1 has one end connected to the other end of the first resistor R1 and the other end grounded.
By adopting the technical scheme, the RC filter circuit is formed by the first resistor R1 and the first nonpolar capacitor C1, so that the voltage signal acquired by the voltage acquisition module is conveniently filtered.
In a third aspect, the present application provides a computer-readable storage medium, which adopts the following technical solutions:
a computer readable storage medium storing a computer program that can be loaded by a processor and execute the method as in the first aspect.
In summary, the present application includes at least one of the following beneficial technical effects: in the process of battery voltage inspection, the voltage signal of each single battery in the battery pack is collected, the voltage signal is processed and calculated according to each single battery, the voltage value of each single battery is obtained, then the voltage state of each single battery is judged according to the voltage value, the voltage information of each single battery can be obtained, and corresponding charging and discharging management is carried out on the single battery with the voltage state being the fault state, thereby being convenient for knowing the voltage state of each single battery in the battery pack, and timely taking corresponding measures for the single batteries which do not normally work, the condition that the inconsistent voltage of partial single batteries influences the power supply performance of the battery pack is avoided to a certain extent, and the safety and the stability of the battery pack during power supply are ensured.
Drawings
Fig. 1 is a schematic flow chart of a hydrogen fuel cell voltage patrol control method according to an embodiment of the present application.
Fig. 2 is a schematic flow chart of a hydrogen fuel cell voltage patrol control method according to an embodiment of the present application.
Fig. 3 is a block diagram of a hydrogen fuel cell voltage patrol control system according to an embodiment of the present application.
Fig. 4 is a schematic view of a connection structure between a voltage acquisition module and a battery pack according to an embodiment of the present application.
FIG. 5 is a schematic diagram of a microprocessor module according to an embodiment of the present application.
Description of reference numerals: 101. collecting a voltage signal; 102. acquiring a voltage value; 103. judging the voltage state; 104. a charging and discharging management step; 201. a voltage acquisition module; 202. a microprocessor module; 203. a management terminal; 204. and a filter circuit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below with reference to fig. 1-5 and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
At present, the hydrogen fuel cell power supply is one of the automobile power supply modes, and in the actual power supply of the battery pack, the voltage of part of the single cells is often too high or too low, so that it is particularly important to detect and know the voltage state of each single cell in the battery pack.
The embodiment of the application discloses a voltage inspection control method for a hydrogen fuel cell.
Referring to fig. 1 and 2, the hydrogen fuel cell voltage patrol control method includes,
a voltage signal acquisition step 101, which is to acquire voltage signals of each single battery in a battery pack;
a voltage value obtaining step 102, obtaining a voltage value of each single battery according to the voltage signal of each single battery;
a voltage state judgment step 103, which is to judge whether the voltage difference value between the voltage value of each single battery and the preset voltage value exceeds a preset error range, and if the voltage difference value exceeds the preset error range, the voltage state of the single battery is a fault state; if the voltage state of the single battery is not beyond the preset error range, the voltage state of the single battery is a normal state;
a charging and discharging management step 104, in which voltage information of each single battery is acquired, and corresponding charging and discharging management is performed on the single battery with the voltage state being a fault state based on the voltage information of each single battery and a preset voltage value; wherein the voltage information includes a voltage state and a voltage value.
In the above embodiment, in the process of battery voltage inspection, the voltage signals of each single battery in the battery pack are collected, the voltage signals of each single battery are processed and calculated according to the voltage signals of each single battery, the voltage value of each single battery is obtained, then the voltage state of each single battery is judged according to the voltage value, the voltage information of each single battery can be obtained, and the single battery with the voltage state in a fault state is subjected to corresponding charging and discharging management, so that the voltage state of each single battery in the battery pack can be conveniently known, and the corresponding measures can be timely taken for the single batteries which do not normally work, the condition that the inconsistent voltage of partial single batteries influences the power supply performance of the battery pack is avoided to a certain extent, and the safety and the stability of the battery pack during power supply are ensured.
As an implementation manner of the preset voltage value and the preset error range, both the preset voltage value and the preset error range can be manually set according to parameters such as performance indexes of the battery and the like in combination with actual conditions.
As a further embodiment of the hydrogen fuel cell voltage patrol control method, the step of obtaining the preset voltage value further comprises,
and calculating to obtain the average voltage value of each single battery according to the voltage value of each single battery, and taking the average voltage value as a preset voltage value.
The average voltage value can be obtained by summing the voltage values of the single batteries and dividing the sum by the number of the single batteries in the battery pack.
In the above embodiment, the average voltage value of each single battery is used as the preset voltage value, so that the consistency of the voltage values of each single battery in the battery pack is favorably maintained.
As an embodiment of the charge and discharge management step 104, the step of performing corresponding charge and discharge management on the single battery with the voltage state being the fault state includes,
acquiring a voltage value of the single battery with the voltage state being a fault state, judging whether the voltage value of the single battery with the voltage state being the fault state is larger than a preset voltage value or not, and if so, performing discharge management on the single battery according to the preset voltage value; and if not, performing charging management on the single battery according to the preset voltage value.
In the embodiment, according to different voltage values, different charging and discharging management operations are performed on the single battery in the fault state, so that the voltage values of the single batteries tend to be balanced, and the power supply performance and the service life of the battery pack are improved.
As a specific implementation manner of performing charge management or discharge management on a single battery according to a preset voltage value, if a voltage value of the single battery with a voltage state being a fault state is greater than the preset voltage value, performing discharge management on the single battery, and in a discharge process, if it is detected that the voltage value of the single battery is less than or equal to the preset voltage value, stopping discharging the single battery; if the voltage value of the single battery with the voltage state being the fault state is smaller than the preset voltage value, carrying out charging management on the single battery, and if the voltage value of the battery is detected to be larger than or equal to the preset voltage value in the charging process, stopping charging the single battery; in addition, the charge and discharge management of the single battery can be realized by a device such as a relay.
As a further embodiment of the hydrogen fuel cell voltage patrol control method, the voltage state determination step 103 is followed by,
acquiring a voltage value of a single battery with a voltage state being a fault state, judging whether the voltage value of the single battery with the voltage state being the fault state is larger than a preset voltage value, and if so, sending a single battery over-voltage reminding signal; if not, sending a single battery low voltage reminding signal.
In the above embodiment, if it is detected that a certain single battery in the battery pack is in a fault state and the voltage value is greater than the preset voltage value, a single battery over-voltage reminding signal is sent; if a certain single battery in the battery pack is in a fault state and the voltage value is smaller than the preset voltage value, a single battery over-low voltage reminding signal is sent, so that managers can be reminded in time, and the safety of the battery pack during power supply is improved.
The reminding mode after sending the over-high voltage reminding signal of the single battery and/or the over-low voltage reminding signal of the single battery can be a reminding mode in which an alarm lamp flickers and/or a buzzer sounds, or a mode in which reminding information is pushed to a manager.
As a further embodiment of the hydrogen fuel cell voltage patrol control method, the charge and discharge management step 104 is followed by a step of,
acquiring the number of single batteries in a fault state in the battery pack according to the voltage information of each single battery, determining a corresponding preset sampling frequency according to the number based on a sampling mapping table, and re-acquiring voltage signals of each single battery in the battery pack according to the preset sampling frequency; the sampling mapping table comprises a corresponding relation between a plurality of groups of quantity intervals and a preset sampling frequency.
In the embodiment, the preset sampling frequency is determined according to the number of the single batteries in the fault state in the battery pack, so that the dynamic adjustment of the sampling frequency is realized, the condition that the system resource is wasted due to higher sampling frequency or the voltage information is not obtained timely due to lower sampling frequency is reduced, and the adaptability is improved.
As a specific implementation mode for determining the preset sampling frequency based on the sampling mapping table and the number of the single batteries in the fault state in the battery pack, the sampling mapping table includes a corresponding relationship between a plurality of groups of number intervals and the preset sampling frequency, and the number interval to which the single batteries in the fault state belong is determined according to the number of the single batteries in the fault state in the battery pack, that is, the preset sampling frequency corresponding to the number interval can be used as the preset sampling frequency corresponding to the battery pack; for example, the number of the single batteries for which the fault state in the battery pack is detected is 5, and belongs to a number interval [0,6], and the preset sampling frequency corresponding to the number interval is f1, that is, the preset sampling frequency corresponding to the battery pack is f 1; the number of the single batteries with the detected fault states in the battery pack is 14, the single batteries belong to a number interval [10,15], and the preset sampling frequency corresponding to the number interval is f2, so that the preset sampling frequency corresponding to the battery pack can be determined to be f 2; wherein f1< f2, that is, if the number of the single batteries in the battery pack in the fault state is small, sampling can be performed by adopting a low sampling frequency, so that the waste of system resources is reduced; if the number of the single batteries in the fault state in the battery pack is large, sampling can be performed by adopting a high sampling frequency, so that the voltage information of each single battery can be acquired in time, and the safety is improved.
It should be noted that any two number intervals in the sampling mapping table have no intersection, each number interval corresponds to a preset sampling frequency, all the number intervals can completely or partially cover the total number interval of the single batteries in the battery pack, and the opening and closing of the end points of each number interval, the length of each number interval, the number of the number intervals, and the preset sampling frequency corresponding to each number interval can be set and adjusted in combination with reality.
Of course, the voltage signals of each single battery in the battery pack can be collected in real time, or the sampling frequency can be preset according to actual requirements and then collected according to the sampling frequency; when the sampling is performed according to the sampling frequency, the sampling frequency can be obtained by the method, or can be set by other methods such as a preset rule or historical experience.
The embodiment of the application also discloses a voltage inspection control system of the hydrogen fuel cell.
Referring to fig. 3, the hydrogen fuel cell voltage inspection control system includes a voltage acquisition module 201, a microprocessor module 202 and a management terminal 203;
a voltage signal input end of the voltage acquisition module 201 is used for being connected with a voltage signal output end of each single battery in the battery pack; the voltage acquisition module 201 is configured to acquire a voltage signal of each single battery and convert the voltage signal into a digital signal;
a digital signal input end of the micro-processing module is connected with a digital signal output end of the voltage acquisition module 201; the micro-processing module 202 is configured to obtain a digital signal, and process and calculate the digital signal to obtain voltage information of each single battery; the voltage information comprises a voltage value and a voltage state;
and the management terminal 203 is in communication connection with the micro-processing module 202 and is used for receiving the voltage information of each single battery and performing corresponding charging and discharging management.
In the above embodiment, in the battery voltage inspection process, utilize voltage acquisition module 201 to acquire the voltage signal of each cell in the battery pack, and convert voltage signal into digital signal, the digital signal is processed and calculated through microprocessor module 202, obtain the voltage information of each cell and feed back to management terminal 203, management terminal 203 carries out corresponding charge and discharge management according to the voltage information of each cell again, thereby be convenient for know the voltage state of each cell in the battery pack, and in time make counter-measures to the cell that does not normally work, the condition that partial cell voltage nonconformity influences the power supply performance of battery pack has been avoided to a certain extent to take place, security and stability when having guaranteed the power supply of battery pack.
As an embodiment of the battery pack, referring to fig. 4, the battery pack is composed of a plurality of unit cells connected in series with each other through a lead; the number of the single batteries can be set according to the situation; in the embodiment of the invention, the plug of J1 is adopted, the voltage signal of each single battery is obtained by plugging the plug on the joint of the battery pack, and the plug of J1 has 40 pins, so that 40 single batteries are correspondingly connected.
As an embodiment of the voltage acquisition module 201, referring to fig. 4, the voltage acquisition module 201 includes a plurality of voltage signal input terminals, and each voltage signal input terminal is correspondingly connected to a voltage signal output terminal of each single battery; the voltage acquisition module 201 is a voltage acquisition chip U1, and the voltage acquisition chip U1 includes a plurality of analog signal input ends, and every analog signal input end corresponds and connects in every voltage signal input end of voltage acquisition module 201, and voltage signal through voltage acquisition chip U1 with each battery cell simulation turns into digital signal and sends to the micro-processing module 202.
Referring to fig. 4, the voltage acquisition chip U1 has 16 analog signal input terminals, each of which is connectable to one cell, that is, each of the voltage acquisition chips U1 can acquire voltage signals of 16 cells at most; therefore, when the number of the single batteries of the battery pack is not more than 16, the voltage signals of all the single batteries can be acquired by only adopting one voltage acquisition chip U1; when the number of the battery cells of the battery pack is more than 16, the voltage acquisition module 201 may include a plurality of communicatively connected voltage acquisition chips U1, each of the voltage acquisition chips U1 is connected to 16 battery cells, and then communicates with the microprocessor 202 through a high-speed universal asynchronous receiver/transmitter (UART) interface of one of the voltage acquisition chips U1.
For example, when the number of the single batteries in the battery pack is 220, and each voltage acquisition chip U1 can complete acquisition of 16 single batteries at most, at least 14 voltage acquisition chips U1 are required to form the voltage acquisition module 201 to complete voltage acquisition of the battery pack, each voltage acquisition chip U1 transmits data through a communication interface group for data transmission in mutual communication, and finally, the high-speed universal asynchronous receiver/transmitter (UART) interface of one of the voltage acquisition chips U1 communicates with the microprocessor module 202, so that the voltage signal of each single battery in the battery pack can be sent to the microprocessor module 202.
Referring to fig. 5, the microprocessor 202 is a processing chip U2, and the processing chip U2 and the voltage acquisition chip U1 are communicatively connected via a UART serial communication interface.
As an implementation manner of the processing chip U2, the processing chip U2 has a CPU operation speed as high as 150MHz and a built-in digital signal processor, can support a 256KB flash memory and a 32KB random access memory at most, and supports a USB Device crystal-oscillator-free design by matching with an independent 48MHz internal oscillator, so that the cost can be reduced and the product reliability can be improved; in addition, because two high-speed rail-to-rail input/output analog voltage comparators and a 12-bit 16-channel high-speed ADC with a sampling rate as high as 2M SPS are expanded, the requirements of high-speed data acquisition, mixed signal processing and industrial control can be fully met.
As an embodiment of the management terminal 203 being communicatively coupled to the microprocessor 202, the management terminal 203 may communicate with the microprocessor 202 by a wireless connection or a wired connection.
As a further embodiment of the hydrogen fuel cell voltage inspection control system, referring to fig. 4, the hydrogen fuel cell voltage inspection control system further includes a filter circuit 204, where the filter circuit 204 is configured to filter a noise signal generated when the voltage acquisition module 201 acquires a voltage signal; wherein the filter circuit 204 comprises a first resistor R1 and a first non-polar capacitor C1; one end of the first resistor R1 is used for being connected with the voltage signal output end of the single battery, and the other end of the first resistor R1 is connected with the voltage signal input end of the voltage acquisition module 201; the first non-polar capacitor C1 has one end connected to the other end of the first resistor R1 and the other end connected to ground.
As an implementation manner of the filter circuit 204, the filter circuit 204 is disposed between a voltage signal output end of each single battery and each voltage signal input end of the voltage acquisition module 201, so as to ensure that the acquired voltage signals of each single battery are voltage signals after filtering processing.
In the above embodiment, the filter circuit 204 is used to filter the noise signal generated when the voltage signal is collected by the voltage collecting module 201, so as to smooth the voltage signal, thereby improving the stability of the voltage collection.
As a further embodiment of the hydrogen fuel cell voltage routing inspection control system, the microprocessor module 202 further includes,
the voltage state judging unit is used for judging whether the voltage difference value between the voltage value of each single battery and the preset voltage value exceeds a preset error range, and if the voltage difference value exceeds the preset error range, the voltage state of the single battery is obtained and is a fault state; if the voltage state of the single battery is not beyond the preset error range, the voltage state of the single battery is a normal state;
the reminding signal sending unit is used for acquiring the voltage value of the single battery with the voltage state being the fault state, judging whether the voltage value of the single battery with the voltage state being the fault state is larger than a preset voltage value or not, and sending a reminding signal of the voltage over-high of the single battery if the voltage value of the single battery with the voltage state being the fault state is larger than the preset voltage value; if not, sending a single battery low voltage reminding signal.
As a further embodiment of the hydrogen fuel cell voltage routing inspection control system, the microprocessor module 202 further includes,
the sampling frequency control unit is used for acquiring the number of the single batteries in the fault state in the battery pack according to the voltage information of each single battery, and determining the corresponding preset sampling frequency according to the number based on the sampling mapping table; the sampling mapping table comprises a corresponding relation between a plurality of groups of quantity intervals and a preset sampling frequency.
As a further embodiment of the hydrogen fuel cell voltage patrol control system, the management terminal 203 includes,
the judging unit is used for acquiring the voltage value of the single battery with the voltage state being the fault state, judging whether the voltage value of the single battery with the voltage state being the fault state is larger than a preset voltage value or not, outputting a first judging result if the voltage value of the single battery with the voltage state being the fault state is larger than the preset voltage value, and outputting a second judging result if the voltage value of the single battery with the voltage state being the fault state is not larger than the preset voltage value;
the discharge management unit is used for responding to the first judgment result and performing discharge management on the single battery according to a preset voltage value;
and the charging management unit is used for responding to the second judgment result and carrying out charging management on the single battery according to the preset voltage value.
In the above embodiment, after performing corresponding charge and discharge management on the single battery in the failure state, the voltage acquisition module 201 may acquire the voltage signal of each single battery of the battery pack again according to the preset sampling frequency, and according to the newly obtained voltage information of each single battery, corresponding charge and discharge management may be performed on the single battery in the new failure state, and after repeated charge and discharge management, the voltage values of each single battery tend to be balanced, thereby improving the power supply performance of the battery pack.
The hydrogen fuel cell voltage inspection control system can realize any one method of the hydrogen fuel cell voltage inspection control methods, and the specific working process of the hydrogen fuel cell voltage inspection control system can refer to the corresponding process in the method embodiment.
When the hydrogen fuel cell voltage inspection control system of the embodiment of the application is applied to detection of a hydrogen fuel cell system of an automobile, the management terminal 203 of the hydrogen fuel cell voltage inspection control system can be a vehicle master control terminal, the vehicle master control terminal is connected with the vehicle fuel cell system, and control operations such as charging and discharging management can be performed on the fuel cell system through the vehicle master control terminal.
The embodiment of the application also discloses a computer readable storage medium.
A computer readable storage medium storing a computer program that can be loaded by a processor and executed to perform a hydrogen fuel cell voltage patrol control method as described above.
The computer-readable storage medium includes, for example: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
It should be noted that, in the foregoing embodiments, descriptions of the respective embodiments have respective emphasis, and reference may be made to relevant descriptions of other embodiments for parts that are not described in detail in a certain embodiment.
In the several embodiments provided by the present invention, it should be understood that the provided method and system may be implemented in other ways. For example, the system embodiments described above are merely illustrative; for example, a module may be divided into only one logical function, and another division may be implemented in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, systems or units, and may be in an electrical, mechanical or other form.
The foregoing is a preferred embodiment of the present application and is not intended to limit the scope of the application in any way, and any features disclosed in this specification (including the abstract and drawings) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
Claims (10)
1. A voltage inspection control method for a hydrogen fuel cell is characterized by comprising the following steps: the voltage patrol control method of the hydrogen fuel cell comprises the following steps,
a voltage signal acquisition step (101) for acquiring voltage signals of each single battery in the battery pack;
a voltage value obtaining step (102) for obtaining the voltage value of each single battery according to the voltage signal of each single battery;
a voltage state judgment step (103) for judging whether the voltage difference value between the voltage value of each single battery and the preset voltage value exceeds a preset error range, and if the voltage difference value exceeds the preset error range, obtaining that the voltage state of each single battery is a fault state; if the voltage state of the single battery is not beyond the preset error range, the voltage state of the single battery is obtained to be a normal state; and the number of the first and second groups,
a charging and discharging management step (104) for acquiring voltage information of each single battery and performing corresponding charging and discharging management on the single battery with the voltage state being a fault state based on the voltage information of each single battery and a preset voltage value; wherein the voltage information includes a voltage state and a voltage value.
2. The hydrogen fuel cell voltage inspection control method according to claim 1, characterized in that: the step of obtaining the preset voltage value comprises,
and calculating to obtain the average voltage value of each single battery according to the voltage value of each single battery, and taking the average voltage value as a preset voltage value.
3. The hydrogen fuel cell voltage inspection control method according to claim 1, characterized in that: the step (103) of determining the voltage state further comprises the following steps,
acquiring a voltage value of a single battery with a voltage state being a fault state, judging whether the voltage value of the single battery with the voltage state being the fault state is larger than a preset voltage value, and if so, sending a single battery over-voltage reminding signal; if not, sending a single battery low voltage reminding signal.
4. The hydrogen fuel cell voltage inspection control method according to claim 1, characterized in that: the step of performing corresponding charge and discharge management on the single battery with the voltage state as the fault state comprises the following steps,
acquiring a voltage value of a single battery with a voltage state being a fault state, judging whether the voltage value of the single battery with the voltage state being the fault state is larger than a preset voltage value or not, and if so, performing discharge management on the single battery according to the preset voltage value; and if not, performing charging management on the single battery according to a preset voltage value.
5. The hydrogen fuel cell voltage inspection control method according to any one of claims 1 to 4, characterized in that: the charging and discharging management step (104) further comprises,
acquiring the number of single batteries in a fault state in the battery pack according to the voltage information of each single battery, determining a corresponding preset sampling frequency according to the number based on a sampling mapping table, and re-acquiring voltage signals of each single battery in the battery pack according to the preset sampling frequency; the sampling mapping table comprises a corresponding relation between a plurality of groups of quantity intervals and a preset sampling frequency.
6. The utility model provides a hydrogen fuel cell voltage inspection control system which characterized in that: the hydrogen fuel cell voltage inspection control system comprises a voltage acquisition module (201), a micro-processing module (202) and a management terminal (203);
the voltage signal input end of the voltage acquisition module (201) is connected with the voltage signal output end of each single battery in the battery pack; the voltage acquisition module (201) is used for acquiring voltage signals of the single batteries and converting the voltage signals into digital signals;
the digital signal input end of the micro-processing module (202) is connected with the digital signal output end of the voltage acquisition module (201); the micro-processing module (202) is used for acquiring the digital signals and processing and calculating the digital signals to obtain voltage information of each single battery; wherein the voltage information comprises a voltage value and a voltage state;
and the management terminal (203) is in communication connection with the micro-processing module (202) and is used for receiving the voltage information of each single battery and performing corresponding charging and discharging management.
7. The hydrogen fuel cell voltage inspection control system according to claim 6, characterized in that: the voltage acquisition module (201) comprises a voltage acquisition chip U1, the analog signal input end of the voltage acquisition chip U1 is connected with the voltage signal input end of the voltage acquisition module (201), and the digital signal output end of the voltage acquisition chip U1 is connected with the digital signal output end of the voltage acquisition module (201).
8. The hydrogen fuel cell voltage inspection control system according to claim 6, characterized in that: the hydrogen fuel cell voltage inspection control system further comprises a filter circuit (204), wherein the filter circuit (204) is used for filtering noise signals generated when the voltage acquisition module (201) acquires the voltage signals.
9. The hydrogen fuel cell voltage inspection control system according to claim 8, characterized in that: the filter circuit (204) comprises a first resistor R1 and a first nonpolar capacitor C1, wherein one end of the first resistor R1 is used for being connected with the single batteries of the battery pack, and the other end of the first resistor R1 is connected to the voltage signal input end of the voltage acquisition module (201); the first non-polar capacitor C1 has one end connected to the other end of the first resistor R1 and the other end grounded.
10. A computer-readable storage medium characterized by: a computer program which can be loaded by a processor and which executes the method according to any of claims 1 to 5.
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